X0306 4 2022-05-23 0001897982 Aspen Technology, Inc. AZPN 0001463490 Smith Jill D. C/O ASPEN TECHNOLOGY, INC. 20 CROSBY DRIVE BEDFORD MA 01730 1 Common Stock 2022-05-23 4 A 0 388 A 896 D Director Stock Option (Right to Buy) 167.66 2022-05-23 4 A 0 1147 A 2031-04-20 Common Stock 1147 1147 D Director Stock Option (Right to Buy) 145.35 2022-05-23 4 A 0 265 A 2031-08-31 Common Stock 265 265 D Represents equity awards granted by Aspen Technology, Inc. (which subsequently changed its name to "AspenTech Corporation", "Former AspenTech") that have been converted into equity awards of Emersub CX, Inc. (which subsequently changed its name to "Aspen Technology Inc.", the "Issuer") pursuant to the terms of the Transaction Agreement and Plan of Merger, dated as of October 10, 2021, as amended, among Former AspenTech, the Issuer and certain other parties thereto (the "Transaction Agreement"), pursuant to which Former AspenTech merged with a wholly owned subsidiary of the Issuer and became a wholly owned subsidiary of the Issuer (the "Transaction"). The Transaction closed on May 16, 2022. Pursuant to the terms of the Transaction Agreement, the number of equity awards reported herein were determined on May 23, 2022, based on the five-day volume weighted average price of the Issuer's common stock following the closing of the Transaction. Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock. One third of the options granted at the exercise price of $167.66 will vest on the first anniversary of the grant and the remainder will vest in eight consecutive quarterly installments on the last business day of the quarter until fully vested (except as otherwise necessary to avoid vesting of a fractional share). The option granted at the exercise price of $145.35 was fully vested on the date of grant. /s/ F.G. Hammond, attorney-in-fact for Ms. Smith 2022-05-25